Please check which of your addons overwrite this function.
It's also possible that another addon hides the result of 'AskPlayerInfo'.
try: "/run AskPlayerInfo( "a_charname")"
(it's the function call which is triggered when using shift+click)

I will use google to translate.
With previous versions of the addon and the auction closed window, if I Shift + pulse a player name in chat I get information.
If I upgrade to version 3 of the addon that function disappears.

Use d3dfix, pbinfo, wowmap and not much more.The problem is version 3 of the addon, because with the previous version if it worked that function.

Could you please speak in english, if possible? That really would make it easier to understand you.

It's not really clear what is happening in which situation. With version 3.0.0 you aren't getting any player information when you shift + left click a link? But with a previous alpha version you are? Then you are saying it's completely independent and it shows the player information? I don't understand...

What exactly is currently wrong? And what do you expect it to do? What addons do you use?
I've checked my current unreleased development version, the 3.0.0 release version and the alpha version of 16th November 2012. In every version the addon is behaving the exactly same:
The auction frame is open: Player name is inserted into the search box at shift + left click.
The auction frame is closed: The Player information is shown in the chat frame.

When the auction window is open and you are shift klicking a hyperlink you are inserting it into the search bar. That's completely normal but we can improve the behaviour so that this doesn't count for players.